Engineering Guide CDA3000
A-11
Appendix A  Formula bank
DE
EN
1
2
3
4
5
6
7
A
F Circumferential force N
J Overall mass moment of inertia kg 
· m²
M Motor torque Nm
M
L
Load torque Nm
n Speed rpm
P Motor power W
P
L
Power output of load W
r Radius of drive roller mm
t
BE
Acceleration time s
∆ν Differential speed rpm
ω Angular velocity 1/s
PA 6 and PA 66 0.2 to 0.4
PE - LD 0.2 to 0.25
PE - HD 0.25 to 0.3
PP 0.25 to 0.3
PVC 0.15 to 0.2
Torques
Torque to produce translational movement
Acceleration torque
Acceleration time
Table 7.10 Torques
Thermoplast
Specific drive power
 in kWh/kg
Table 7.9 Specific drive power for various thermoplasts
A.2.3 Torques
M
Fr⋅
1000
----------- 955
P
n
--
⋅,==
M
BE
J ω
·
⋅ J
n
·
955,
-----------
⋅ J=
n∆
955, t
BE
⋅
----------------------
⋅==
t
BE
J
n∆
955, M( M
L
)–⋅
--------------------------------------
⋅ J
n )
2
∆(
91 2, P( P
L
)–⋅
-----------------------------------
⋅==